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Radeon HD 4850 2GB vs Radeon HD 5830

Intro

The Radeon HD 4850 2GB has clock speeds of 625 MHz on the GPU, and 993 MHz on the 2048 MB of GDDR4 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Compare that to the Radeon HD 5830, which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It is made up of 1120(224x5) SPUs, 56 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
Radeon HD 5830 175 Watts
Difference: 65 Watts (59%)

Memory Bandwidth

In theory, the Radeon HD 5830 should be much faster than the Radeon HD 4850 2GB overall. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 64448 (101%)

Texel Rate

The Radeon HD 5830 is a lot (more or less 79%) better at AF than the Radeon HD 4850 2GB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 19800 (79%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5830 is a better choice, and very much so. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 2800 (28%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 4850 2GB

Amazon.com

Check prices at:

Radeon HD 5830

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 4850 2GB Radeon HD 5830
Manufacturer AMD AMD
Year Jun 25, 2008 February 25, 2010
Code Name RV770 PRO Cypress LE
Memory 2048 MB 1024 MB
Core Speed 625 MHz 800 MHz
Memory Speed 1986 MHz 4000 MHz
Power (Max TDP) 110 watts 175 watts
Bandwidth 63552 MB/sec 128000 MB/sec
Texel Rate 25000 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800(160x5) 1120(224x5)
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR4 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 956 million 2154 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4850 2GB

Amazon.com

Check prices at:

Radeon HD 5830

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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